Iron-nickel-copper alloy.



GUILLIAM H. CLAMER, OF PHILADELPHIA, PENNSYLVANIA.

IRON-NICKEL-COPPER ALLOY.

No Drawing.

- Specification of Letters Patent. Application filed August 19, 1909. Serial No. 513,537.

Patented Feb. 6,1912.

To all whom it may concern:

a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and Statepof Pennsylvania, have invented a certain new and useful Iron- Nickel-Copper Alloy, of which the following is a specification.

Objects of the present invention are first, to provide iron-copper-nickel alloys which are possessed of new uses and properties and are practically non-corrosive, which are of a low co-efiicient of expansion and of great mechanical strength, which can be rolled into sheets, rods and the like, and which can be comparatively .cheaply produced; and

second, to provide a method or process of making a homogeneous iron-nickel-copper alloy in whichon casting and cooling, no

separation of metal in the form of hard nodules or otherwise occurs.

The alloy is of wliitish color and it can be made wlthinthe following range of proportions by Weight:

Nickel 25170 Copper -1 5 to 20% Iron 30 to 70% melted together and cast, the perfection of the alloy depends entirely on the amount of carbon present. Pure copper and pure iron melted together in a crucible, free from carbon,-will alloy in all proportions. With a small amount of carbon present, copper separates in the form of nodules and with increased amounts of carbon present, greater separation takes place, sothat when the carbon content is high, -t'or instance, as incas't iron, almost complete separation occurs. In

accordance with my invention the separation of hard nodules is prevented by carefully limiting the carbon content. The strength of the alloy, however, is to a great extent regulated by theamount of carbon present. For these reasons the proportion of carbon in the alloy cannot be definitely Be it known that I, GUILLIAM H. CLAMER,

stated, but is fixedzin any instance by havmg regard to the strength required of the alloy and to the carbon content that can be For the sake of a further description, it

may be stated that an alloy containing iron, 25% nickel and 10% copper and of one per cent. of carbon has the following approximate physical properties: On a test bar one-half inch in diameter and two inches between shoulders, strain per square inch in pounds 96,100, limit of elasticity per square inch in pounds 51,750, elongation per cent. of original length 42%, reduction of area per cent. of original section 53.7; but the above is given without intending to limitmy patent-to such proportions.

vTo make the described alloy the ingredients thereof should be mixed, having regard to the proportions specified, and melted and cast in the usual way of preparing alloys, care being taken in melting to carefully regulate and limit 'the carbon content. In casting, a small amount ofmanganese or magnesium may, if desired, be added and when present it acts as a de-oxidizing agent.. The alloy may be made directly-from appropriate ore and the process of doing this forms the subject-matter of my co-pending' application, serially numbered 513,538, patented August 2, 1910, No. 965,871..

What I claim is:

1. A homogeneous iron nickel-copper alloy comprising nickel 25 to-50 per centum, copper 5 to 20 per centum, iron 30 to 70 per centum, and carbon and which is free from hard metallic nodules.

2. A homogeneous iron-nickel-copper alloy comprising nickel 25 to 50 per centum,

copper 5' to 20 per centum, iron 30 to 70 per centum and which is free from hard met-allic nodules.

In testimony whereof I have hereunto signed my name. v

.GUILLIAM H. CLAMER.

Witnesses:

- NIMMCGARVEY.

.J. CECIL BRIcHTBILL; 

